Flann O'Brien's most popular and surrealistic novel concerns an imaginary, hellish village police force and a local murder. Weird, satirical, and very funny.
Brian O'Nolan he was born He spoke Irish at home and learned English second (and German too); yet arguably his greatest work - the Third Policeman - is a tour de force of English linguistical pyrotechnics and Lewis Carroll-like absurdist exoticism - people turning into bicycles is par for the course.
This is a unique work by Flann O'Brien - funny, oblique,odd, beguiling, and horrific by turns. It's got a peculiar, pastoral, otherworldly quality, yet at the same time you can believe that it really is taking place in some deranged Irish backwater town.
To give you an example something that made me howl with laughter, the central character falls foul of the law, and is sentenced to be hanged, on a trumped up charge, so they build a gallows in the police station yard, but the chippie is scarcely competent, so he prevails on the narrator to give him a hand....
Anything else would be a spoiler. I'd say it was about the "Banality of evil" amongst other things. O'Brien, IMO hated authority, so he took the pee out of them, but also recognised their inherent danger - the other two policemen are incompetent buffoons but nevertheless represent a (sort-of) totalitarian state.
You'll never look at a bicycle the same way again ;-)